| Opera digital transmission mode on 122.4 GHz received at a distance of 52 Km GHz Europe |
| Opera digital transmission mode on 122.4 GHz received at a distance of 52 Km https://ghz-europe.com/122-ghz-news-from-uk/ https://www.youtube.com/watch?v=ATbTJUY5e1I https://youtu.be/6-ooidYodlE |